#5431: Add popCount to Data.Bits
---------------------------------+------------------------------------------
Reporter: tibbe | Owner:
Type: feature request | Status: new
Priority: normal | Component: libraries/base
Version: 7.2.1 | Keywords:
Testcase: | Blockedby:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
---------------------------------+------------------------------------------
Now when we have a fast `popCnt#` primop it would be nice to expose it to
the world through an official API. I propose we add this method to the
`Bits` class in `Data.Bits`:
{{{
-- | Return the number of set bits in the argument, know as the
-- population count or the Hamming weight.
popCount :: a -> Int
}}}
The proposal was discussed and agreed upon in this thread:
http://thread.gmane.org/gmane.comp.lang.haskell.libraries/16073
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5431>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
_______________________________________________
Glasgow-haskell-bugs mailing list
[email protected]
http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
